How do you debated a Muslim?

[Something completely different]

Naskh is abrogation - which is applied to the Quran. It is static: I.e. the Naskh will have been decided upon by the scholar or school in question and they'll stick to that opinion. It is broadly decided upon which verses have been abrogated. Hidden meanings cannot be taken from the Quran using Sunni hermeneutics - the original meaning cannot be abandoned unless it has been abrogated due to it being used only for a specific situation.

And how does this piece of useless knowlege fit into this thread?

Islamic jurisprudence takes into consideration the factor of 'urf (local custom) hence why you can have different rulings for different locales and hence why it's not truly representative to say a Muslim in the West wants the same as a Muslim thousands of miles away in Saudi. Like our own legal system it has fixed principles which produce varied legal rulings over time.

So for your Islamic "urf" bla bla, it would be alright for you to let south american Indians hunt heads? South African men rape lesbian women? Indian Hindus burn widows? Indian sociaty too keep up it`s brutal carst system?

Your urf is worthless and has no place in a modern world in which traditions are not seen as a valuable argument, but as a pathetic excuse to infringe peoples rights.

The thing is: Islam is not Protestant Christianity. I mean Protestants may just be permitted to take an isolated verse and spout an authoritative opinion on the matter but that is not how Islam functions.

I bet the iranian revolutionary guards and the saudi religious police will disagree with you and assert the opposite.

There is scripture and a continually adaptive tradition alongside that too and that's how decisions are made in Islam - using the full context. The single aim of Islam is to help us live in proper harmony with that which created us.

And it does so by doing such wonderfull and human things like slavery, infringing womens rights and discriminating non muslims.

ohh how wonderfull

One reason why it's just silly to say "I read the Quran - I know Islam!" Islam has never ever been sola scriptura - just the Quran.

But it is the most importent one and the one which your people follow. (although some, to be fair, ignore stuff like the slavery part)

Local context and tradition ensured that Islam adapted and changed suiting lots of very different contexts over the centuries.

nope. modernety changed what muslims can do and can no longer do.

like keeping slaves.

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I'm white and I don't think I need to apologize for that and I don't think that positing that a contribution of my people to philosophy (truth through falsification) should be followed.

My family are born and bred Scottish - so please apologize for your incorrect accusation of hypocrisy for living in Britain - but you won't cos you just have been and continue to be a foul mouthed and rude person.

Being atheist or agnostic doesn't mean you have to be offensive and rude to those who aren't convinced you are a son of logic and proof.

Should I be offensive and insulting to you?

You told me that your family are bigoted etc.

I suggest you try to avoid such behaviour - please!

So apology for that?

Islamic countries by a mayority opress women.
Still checkmate.